PS vs. PTFE
Both PS and PTFE are thermoplastics. There are 12 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.
For each property being compared, the top bar is PS and the bottom bar is PTFE.
Metric UnitsUS Customary Units
Mechanical Properties
| Elongation at Break, % | 1.8 to 40 | |
| 75 to 300 |
| Flexural Strength, MPa | 62 to 80 | |
| 13 to 50 |
| Tensile Strength: Ultimate (UTS), MPa | 32 to 44 | |
| 13 to 25 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 70 | |
| 260 to 270 |
| Thermal Conductivity, W/m-K | 0.14 to 0.22 | |
| 0.24 to 0.65 |
| Thermal Expansion, µm/m-K | 80 to 98 | |
| 110 to 120 |
Electrical Properties
| Electrical Resistivity Order of Magnitude, 10x Ω-m | 14 to 15 | |
| 2.0 to 18 |
Otherwise Unclassified Properties
| Density, g/cm3 | 1.0 | |
| 2.1 to 2.3 |
| Limiting Oxygen Index (LOI), % | 18 | |
| 90 |
| Water Absorption After 24 Hours, % | 0.040 to 0.080 | |
| 0.0093 to 0.050 |
Common Calculations
| Strength to Weight: Axial, points | 8.5 to 12 | |
| 1.7 to 3.2 |
| Strength to Weight: Bending, points | 22 to 26 | |
| 5.7 to 8.7 |